Schedule: the flights that flew on Thursday, Nov 5, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3660
SCHEDULED · TYPICAL SCHEDULE
Thursday, November 12 Tomorrow
WN 3660 · GRR → LAS
departs 3:06 PM ET · arrives 4:06 PM PT
Forecast issued Wed 4:00 AM ET · 35h before departure
Watch this flight
Other days
Thu 11/12
Fri 11/13 37%
Sun 11/15 41%
Mon 11/16 30%
Odds over time
Arrive at LAS more than 15 minutes late?
25%
chance · ±4 pts
+1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
25%
Leave 15+ late
32%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.6d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 22% · changed +1 pt in 24h
+1 pt
25%
Yes 25%
No 75%
Leave GRR more than 15 minutes late?
Calm-weather odds: 32% · changed −1 pt in 24h
−1 pt
32%
Yes 32%
No 68%
Arrive at LAS more than an hour late?
Calm-weather odds: 6% · changed +1 pt in 24h
+1 pt
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to LAS?
On time or early
74%
15–30 min late
11%
30 min–1 hour late
8%
1–2 hours late
4%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
WN's recent on-time record
↑
LAS is prone to delays
↑
Arrivals into LAS at that hour are often late
↓
Mostly benign weather forecast at LAS
↓
GRR usually runs smoothly
Weather at each end
GRR (origin)
Gusts 21 kt Ceiling 1,300 ft Visibility 4 mi Precip 0.06 in
LAS (destination)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
How this resolves
Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.
Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.